A massager is provided that includes a base portion having a first guide rail and a second guide rail, a support member having a front support member and a rear support member that are movable independently of each other, a seat portion supported on the base portion via the support member, and a seat portion driving device. The front support member is rotationally connected to a front end of the seat portion, and is driven by the seat portion driving device and guided by the first guide rail to move the front end of the seat portion in an up-and-down direction. The rear support member is rotationally connected to a rear end of the seat portion, and is driven by the seat portion driving device and guided by the second guide rail to move the rear end of the seat portion in the up-and-down direction.